Improvement in lath-bolting machines



vBSheetsf-SheetZ. 1.0. MGINTYRE.

Lath Bultihg Machines.

l510.142,489. yPatented September 2', 187,3.

gf/, fg

3Sheets--Sheet3. l. C. MGINTYRE. l La'th Bolting Machines. N0. 142,489. Patented September 2,1873.

`and Fig. 3, an end elevation of same.

JAMES O. MINTYRE, OF FORT EDWARD, NEW YORK.

IMPROVEMENT IN LA'I'I-I-BGLTING MACHINES.

llllll Specification forming part of Letters Patent No.lgl2,19, dated September 2, 1873; application filed July 10,1873.

To all whom it may concern:

Beit known that I, JAMES C. MGINTYRE, of Fort Edward, in the county of Washington and State of New York, have invented a new and Improved Lath-BoltingMachine 5 and that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawing and to the letters of reference marked thereon making a part of this specification.

This invention is in the nature of an improvement in a bolting-machine, or machine for sawing slabs, plank, Ste., into strips preparatory to their being again sawed into laths. 'lhe invention consists in constructing the rollers on my machine so that they rise and fall independently of each other; and also constructing my machine with a `series of dogs or pawls which engage into and prevent the strips from being thrown backward.

In the accompanying sheets of drawings, Figure 1 represents a plan or top view of my machine; Fig. l, a plan or top view of end bearing of saw-arbor with the cap thereof removed; Fig. 2, a side elevation of machine,

Similarletters of reference indicate likepart in the several gures.

.A represents the frame-work of a boltiugmachine, which may be constructed of any desired size and of any desired material. On the upper side of this frame, and resting in suitable bearin gs, is a sawarbor, B, having the saws b and the driving-pulley@ properly secured thereto. To the'fraine A, and on either side of the saws b and resting in suitable bearings, are the feed-rollers c c', and immediately above said feed-rollers are two pressurerollers, C O. The inner ends of the feed-rollers c c have affixed to them gear-wheels d d. Secured tothe frame A, and properly supported by suitable bearings, is a vertical shaft, D, the upper end of this shaft having aflixed to it a face-wheel, c, and its lower end a beveled gear-wheel, f; also, secured to the` frame A and supported inv suitable bearings, is a horizontal shaft, E, having secured to its inner end a beveled gearwheel, g, which meshes into the gears of the beveled 'gear-wheelf, and to its outer end a dilvi'iigvpiilley,h; also, secured to said frame A and imei g in suitable bearings, is a horizontal shari, r, having secured to it an adjustable friction wheel, J, and a gear wheel, 7c, which meshes into the teeth of the gear-wheels d d. tImmediately in front of the rear pressureroller G, and supported on an adjustable bridge, l, are a series of dogs or pawls, m, so arranged on the bridge I that they may rise or fall to any given angle, and so placed that said dogs or pawls are immediately opposite or in line with the spaces of the several saws b of the gang of saws. The pressure-rollers C G have their bearings supported and kept in position by guide-rods H,which pass through suitable openings or bearings in the framework A. To these guide-rods are bolted or otherwise affixed cross-bars o, and to said cross-bars are secured chains p p', which pass over and are secured to pulleysrr, these pul-` leys being properly keyed to horizontal shafts K Ki. Onto these shafts are also keyed or otherwise fixed pulleys t t', and onto the shaft K is also affixed a loose pulley, s.' Hinged or otherwise suitably secured to thel frame A are two levers, L L', to which are attached chains c c', which pass over and are secured to the fixed pulleys t t. Attachedto the frame A, and passing from one side to the other of the same, is a feed-rod, iu, the outer end of which is provided with a'handwheel, n, and the inner portion of which has formed upon it screw-threads. On this feedrod is a clutch, y, the base of which is screwed on the threads of the feed-rod, and the forks of which encircle a groove in the neck of the friction-wheel J Y My machine being constructed substantially as above described, its operation is as follows: Power is applied to the arbor of the saws by belt on the driving-pulley a, causing the saws to revolve as in machines as orrlhe plank or slab de-` dinarily constructed. signed to be cut into strips is passed under the pressure-roller C, `which will cause the plank or slab to bear upon the feed-rollers c c', these feed-rollers revolving by means of a strap passing around the pulley h of the shaft E, and the pulley Ii on theouter end of the arbor B, and thus feeding the plank or slab to the saws b, which pass through it, cutting it into strips, and thence under the pressure` roller C', and onto the feed-roller c', and outward, clear of the machine.

New, it will be seen that if beth of the pressure-rollers G Gf moved upward simultaneously with the introduction of the plank under the rst pressure-roller, or, in other words, the two pressure-rollers were so constructed as to rise and lower together, and not independently of each other, that no obstacle would be opposed to the loose strips, into which the plank has been sawed, to prevent them being thrown backward by the set of the saw-teeth, with a velocity sufficiently great to endanger the life of the operator, for the reason that the front pressureroller would be necessarily raised, because the rear pressure-roller would be raised by reason of its resting on the sawed strips un der it.

By my construction, however, it willbe seen that both the front and rear pressurerollers rise and fall independently of each other; hence, the moment the rear end of the plank has passed from under the front roller C, it will drop by its gravity, and in this way act as a bar to any slats that may be thrown back, the ends of such slats coming in contact with the said roller and passing no farther.

As a further precaution against throwing the sawed strips backward, I place immediately in front of the pressure-roller C a series of dogs or pawls, m. These dogs are secured to an adjustable rod or bridge, l, in such manner that, as the sawed strips are fed under the pressure-roller Cf, these pawls, which have their lower ends sharpened or serrated, engage into the strips at such an angle as not to interfere with the'passage of the strips from the machine, but yet, at the same time, prevent the strips from being forced backward by the action of the saw. (See Fig. 2.) These dogs are particularly useful in cases where a half-rounded slab is being sawed. The pressure-rollers, bearing only upon the highest part of the curved surface of such slab, can only keep such part of the strips as they bear upon, steady, and secure; but the dogs m, readily accommodating themselves to any thickness or inequalities in the slab or plank, readily engage upon each separate strip, and prevent them from being thrown back, no Inatter what their shape may be. The pressurerollers (l C are raised for the admission of the slab or plank, independently of each other, by the action of the levers L L', by depressing the ends of which the chains pp cause the shafts K K to revolve through the pulleys t t', which, in turn, cause the crostbars o, to which the chains p p are affixed, to be raised, and since these cross-bars are bolted to the guide-rods H of the pressure-rollers C C', as before mentioned, the guide-rods are forced upward, and lift with them said pressure-rollers, each lever and its rollers, shafts, and chains workin g independent ofeach other.

The speed at which the planks are fed to the saws is regulated or adjusted by means of the friction-wheel J bearing upon the facewheel e, as in ordinary bolting-machines, but such feed apparatus has heretofore, in similar machines, been placed in a horizontal position, so that the face-wheel exerted a horizontal thrust-against the friction-wheel, the result being that in a very short time the friction-wheel was thrown out of the perpendicular by the unequal wearing of its lower journal. By my arrangement of the feed device, as readily seen, the face-wheel e and its shaft are perpendicular, so that the pressure ofthe friction-wheel J must be parallel with the axis of motion; therefore, the wear upon the journals of the face-wheel will be regular and inappreciable.

Whenever it is desired to remove the saws b from the arbor B it is simply necessary to disconnect the bearing P from the frame A, when the inner end t' of the saw-arbor B will be freed from said bearing, so that the nut j may be unscrewed from the arbor, and the saw and nut readily slipped off the same, and, so on, each nut and saw in succession may be removed in a short space of time, and thus obviate the necessity of removing the caps from all the bearin gs, and, by block and tackle, hoisting the arbor and saws clear from the frame, which it is necessary to do in boltingmachines, as ordinarily constructed, unless such machines have no bearing for the outer end of the saw-arbor; in such cases, however, the saw-arbor is apt to have too much vibratory motion. Hence, this feature of my invention saves both time and expense.

To increase or decrease the pressure of the friction-roller J on the face-wheel e an adjusting-screw, M, passes through the bearing ot' the vertical shaft D, so that said shaft may be raised or lowered slightly, and the friction of the bearing-surfaces increased or decreased at pleasure.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The pressure-rollers ofa bolting-machine, hung in bearings in the'frame thereof, and adjusted independently of each other bymeans of levers connected with said bearings by chains passing over pulleys, substantially as described.

2. The combination, in a bolting-machine, of the pressure-rollers adjusted independently of one another, in the manner and for the purpose described, with the dogs or pawls for preventing the strips from being drawn back by the saws, substantially as set forth.

JAMES C. llIcINTYR-E.

fitnessesz JAMES L. REYNoLDs, A.. G. TAYLOR. 

